Corrosion of reinforcing steel in simulated concrete pore solutions

Moreno, María Virginia; Morris, Walter; Alvarez, M.G.; Duffó, G.S.

doi:10.1016/j.corsci.2004.03.013

Cited by 397 publications

(198 citation statements)

References 23 publications

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“…The circuit a is typical of oxide-coated metals [9,12,22,23]. The circuit b presents an additional Page 7 of 43 A c c e p t e d M a n u s c r i p t 7 Warburg element that could be attributed to a diffusion process [24,25]. The experimental data were fitted to the proposed equivalent circuit using ZView  [26].…”

Section: Electrochemical Techniquesmentioning

confidence: 99%

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Phosphate ions as corrosion inhibitors for reinforcement steel in chloride-rich environments

Yohai¹,

Vázquez²,

Valcarce³

2013

Electrochimica Acta

142

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Please cite this article as: L. Yohai, M. Vázquez, M.B. Valcarce, Phosphate ions as corrosion inhibitors for reinforcement steel in chloride-rich environments, Electrochimica Acta (2013), http://dx.doi.org/10. 1016/j.electacta.2013.03.180 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Micro Raman spectra clearly show the incorporation of phosphates to the passive film.Impedance spectroscopy results can be interpreted assuming a duplex surface film formed in the presence of phosphates. In the conditions of this investigation, phosphate ions behave as mixed-type corrosion inhibitors, protecting steel against corrosion in chloride-contaminated environments.

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Section: Electrochemical Techniquesmentioning

confidence: 99%

“…The two most common causes of rebar corrosion are (i) localized breakdown of the passive film on the steel due to penetration of chloride ions [5,6] and (ii) generalized corrosion by acidification of the concrete after reaction with atmospheric carbon dioxide [7][8][9]. Even worse is the combination of these two factors.…”

Section: Introductionmentioning

confidence: 99%

Phosphate ions as corrosion inhibitors for reinforcement steel in chloride-rich environments

Yohai¹,

Vázquez²,

Valcarce³

2013

Electrochimica Acta

142

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“…However, the passive film can be locally damaged and the localized corrosion of reinforcing steel takes place when pH and/or the chloride concentration at the steel/concrete interface reach the critical values for corrosion [4][5][6][7][8][9] . The pH of concrete pore solution decreased during concrete carbonation due to the neutralization of Ca(OH) 2 in the interstitial solution with the acidic gases (CO 2 , SO 2 , etc.)…”

Section: Introductionmentioning

confidence: 99%

“…In spite of the extensive studies of corrosion behaviours of reinforcing steel [4][5][6][7][8][9][10] , the exact mechanism of its depassivation is still unclear. Even though the effect of pH on the corrosion of reinforcing steel was discovered decades ago, there were only a few studies focusing on the depassivation of the steel caused by decreasing pH of concrete pore solution during the carbonation process 8,[11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance of Mild Steel in Simulated Concrete Pore Solution

Pandiarajan¹,

Prabhakar²,

Rajendran³

2013

Chem Sci Trans

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Concrete admixtures can be prepared in various water samples such as rainwater, well water, and seawater. These waters contain various types of ions. So corrosion behavior of mild steel immersed in simulated concrete pore solution prepared with the above water samples will vary. Corrosion resistance of mild steel in simulated concrete pore solution prepared with above water samples has been evaluated by AC impedance spectra. The corrosion resistance of mild steel in various samples of water is as follows: Rainwater>Well water>Seawater. The corrosion resistance of mild steel in simulated concrete pore solution prepared in various water samples are in the decreasing order: Rainwater > Well water > Seawater. This is revealed by charge transfer resistance values and double layer capacitance values.

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“…Because of climate and human factors, the corrosion of reinforcing steel bar has become one of the important reasons of premature deterioration of concrete buildings and infrastructure [1][2][3]. Using stainless steel bar will solve this problem, to some extent [4,5].…”

Section: Introductionmentioning

confidence: 99%

Process and property of hot-rolled stainless steel/carbon steel cladding bar

Jia¹

2016

Funct.Mater.

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To study the process and property of hot-rolled stainless steel/carbon steel cladding bar, a rational pass system is designed for rolling and the bonding strength between the stainless steel cladding and carbon steel core was investigated by using shearing test and bending test. Then, the bonding interface, element diffusion and shearing fracture surface were analyzed by applying optical microscope, EDS and SEM. The results show that the thickness distribution of stainless steel shell is homogeneous; the metallurgical bonding between the two metals is formed after the third pass rolling and the shearing strength of the interface is more than 307 MPa. At the same time, the bending property of the bar displays well. The interface region is clearly divided into stainless steel zone, transition zone and carbon steel zone. Element diffusion occurs at the interface that the Fe of carbon steel diffuses into stainless steel and the Cr, Ni, Mn of stainless steel diffuse into carbon steel. It makes the formation of the transition zone with 20 μm in width in carbon steel and the total width of diffusion zone is 30 μm. Shearing strength of the interface after the sixth pass rolling is higher than the carbon steel substrate and the shearing fracture occurs in the carbon steel.Keywords: cladding bar; stainless steel; rolling; pass design; element diffusionРазработана рациональная система для прокатки, исследована прочность сцепления между облицовкой из нержавеющей стали и ядром из углеродистой стали путем испытаний на сдвиг и изгиб. Проанализированы поверхность сцепления, диффузия элементов и поверхность разрыва при сдвиге с применением оптической микроскопии, ЭДС и СЭМ. Результаты показывают, что распределение толщины оболочки из нержавеющей стали является однородным. Сцепление между этими двумя материалами формируется после третьего прохода прокатки, а прочность сцепления межслоевой границы составляет более 307 МПа. Изгибные свойства бруска оказываются хорошими. Область сцепления четко разделяется на зону нержавеющей стали и зону углеродистой стали. Диффузия элементов возникает на границе, причем Fe из углеродистой стали диффундирует в нержавеющую сталь, а Cr, Ni, Mn из нержавеющей стали диффундирует в углеродистую сталь. Это приводит к формированию переходной зоны шириной 20 мкм в углеродистой стали, ширина диффузионной зоны составляет 30 мкм. Прочность на сдвиг межслоевой границы после шести проходов прокатки становится выше, чем для подложки из углеродистой стали, разрушение сдвига возникает в углеродистой стали. Отримання і властивості облицювальних стрижнів, отриманих гарячим плющенням неіржавіючої сталі на вуглецевій сталі. Джининг Яіа, Янан ГаоРозроблена раціональна система для плющення, досліджена міцність зчеплення між облицюванням з неіржавіючої сталі і ядром з вуглецевої сталі шляхом випробувань на зрушення і вигин. Проаналізовані поверхня зчеплення, дифузія елементів і поверхня розриву при зрушенні із застосуванням оптичної мікроскопії, ЭДС і СЕМ. Результати показують, що розподіл товщини оболонки з неіржавіючої...

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Corrosion of reinforcing steel in simulated concrete pore solutions

Cited by 397 publications

References 23 publications

Phosphate ions as corrosion inhibitors for reinforcement steel in chloride-rich environments

Phosphate ions as corrosion inhibitors for reinforcement steel in chloride-rich environments

Corrosion Resistance of Mild Steel in Simulated Concrete Pore Solution

Process and property of hot-rolled stainless steel/carbon steel cladding bar

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